Application Engineer - Platform Department, System Division, Card Co., Ltd
Listed on 2025-12-05
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Software Development
Backend Developer, Software Engineer
Application Engineer – Platform Department, System Division, Rakuten Card Co., Ltd.
Payment systems using credit cards, e-money, and web applications are now inseparable from everyday life. Rakuten Card leads Japan’s credit card industry, ranking No. 1 in domestic credit card purchase volume and No. 1 in customer satisfaction for 14 consecutive years. As a leading company in the field, we continue to grow and evolve.
Job DescriptionWe are seeking application engineers to join our team during this period of transformation and contribute to the continued growth of Rakuten Card’s services.
Responsibilities include:
- Design, develop, and test APIs that support the Rakuten Card user‑facing website, mobile application, and internal operational improvements.
- Leverage AI during development to improve productivity, security, and quality.
- Collaborate with offshore development members, including Rakuten Fin Tech Vietnam and Rakuten India.
API Development Team involves about 40 members. Development is conducted in units of around 5 members. Offshore development and outsourcing in Vietnam are included. Management is primarily composed of mid‑career hires, and both new graduates and mid‑career professionals are active contributors.
Mandatory Qualifications- At least 3 years of Java development experience (Java 8 or later).
- Development experience using Java EE (especially JPA).
- Experience developing RESTful APIs.
- Experience implementing quality improvements through automated testing and related practices.
- Basic knowledge of using source control tools such as Git/Git Hub.
- Experience with Agile development.
- Basic knowledge of UNIX/Linux‑based servers.
- Basic knowledge of databases and SQL.
- Basic knowledge of networking (TCP/IP).
- Development experience using Git (Git Hub/Bitbucket).
- Experience building and operating an API gateway.
- Experience in cloud lift‑and‑shift initiatives for assigned services and products.
Location:
Tokyo Aoyama or Fukuoka Hakata. You will be employed by Rakuten Group, Inc. and transferred to Rakuten Card Co., Ltd.
Languages:
Japanese (Overall – 3 – Advanced).
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